Enhancing supercritical CO2 immersion resistance of aramid pulp-filled ethylene propylene diene monomer rubber composites through reinforced interfacial bonding
Bibliographic record
Abstract
The development of supercritical carbon dioxide(sCO 2 )-resistant sealing rubbers is a key solution to addressing the critical challenges in the application of sCO 2 -related industries. This study focused on enhancing the sCO 2 immersion resistance of aramid fiber-reinforced ethylene propylene diene monomer (EPDM) rubber composites through strengthened interfacial bonding. Combined modification with coupling agents and polyisocyanate was applied to the surfaces of phosphoric acid-etched aramid fibers. H pull-out tests revealed that after modification, the interfacial bonding strength between the fibers and rubber significantly increased from 12.9 to 51.1 N. Scanning electron microscopy analysis further confirmed this enhanced interfacial bonding. Notably, the modified interface had minimal impact on the high-temperature compression set, thermal aging resistance, thermal decomposition temperature, or low-temperature performance. However, sCO 2 immersion tests (165 °C, 17 MPa, 3 days) revealed that interface reinforcement improved the tensile strength retention of EPDM composites containing phosphoric acid-treated aramid fibers modified with coupling agents and polyisocyanate. Specifically, this modification reduced tensile strength loss from 41 % to 33 %. This study provides a simple and effective surface impregnation-based interfacial reinforcement strategy to enhance the sCO 2 resistance of rubber composites.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".